Type 2 Intramolecular <i>N</i>-Acylnitroso Diels−Alder Reaction: Scope and Application to the Synthesis of Medium Ring Lactams
作者:Steven M. Sparks、Chun P. Chow、Liang Zhu、Kenneth J. Shea
DOI:10.1021/jo049897z
日期:2004.4.1
Heteroatom variants of the type 2 intramolecularDiels−Alderreaction provide an efficient method for the preparation of bridged bicyclic heterocycles. The type 2 variant of the intramolecular N-acylnitroso Diels−Alderreaction is an effective method for the synthesis of bridged bicyclic oxazinolactams. Structural studies of the cycloadducts have allowed for quantification of the deformations of the
Type 2 Intramolecular Nitroso Diels−Alder Reaction. Synthesis and Structure of Bridgehead Oxazinolactams
作者:Steven M. Sparks、Jesse D. Vargas、Kenneth J. Shea
DOI:10.1021/ol005811m
日期:2000.5.1
[reaction--see text] The type 2intramolecular Diels-Alder cycloaddition utilizing N-acylnitroso dienophiles provides an efficient entry into bridged oxazinolactams. In contrast to the bimolecular counterpart, the reaction is completely regioselective. Structural characterization of the cycloadducts allows for evaluation of the olefin distortion and the degree of pyramidalization of the bridgehead